Data Sheet
DUAL LDO REGULATORS
General Description
The AP2401 series are dual positive voltage regulator
ICs fabricated by CMOS process. Each of these ICs
consists of a voltage reference, two error amplifiers,
two resistor networks for setting output voltages. Each
channel has a current limit circuit for current protec-
tion.
The AP2401 series feature high ripple rejection, low
dropout voltage, low noise, high output voltage accu-
racy, and low current consumption which make them
ideal for use in various battery-powered devices. The
chip enable function allows the output of each channel
to be turned on/off independently, greatly reducing the
power consumption.
The AP2401 series have 1.8V/2.5V, 1.8V/2.8V, 1.8V/
3.3V and 2.8V/1.8V versions.
The AP2401 are available in standard SOT-23-6 pack-
age.
AP2401
Features
·
·
·
·
·
·
·
·
Maximum Output Current/Channel: More Than
150mA (300mA Limit)
High Output Voltage Accuracy:
±2%
Low Quiescent Current/Channel: 25µA Typical
Low Standby Current: 0.1µA Typical
High PSRR: 70dB Typical
（f=1kHz)
Extremely Low Noise: 30µVrms (10Hz to
100kHz)
Operating Temperature: -40 to 85
o
C
Compatible with Low ESR Ceramic Capacitor
Applications
·
·
·
·
·
·
Mobile Phones, Cordless Phones
Wireless Communication Equipment
Portable Games
Cameras, Video Recorders
Sub-board Power Supplies for Telecom Equip-
ment
Battery Powered Equipment
SOT-23-6
Figure 1. Package Type of AP2401
Oct. 2009 Rev. 1. 4
1
BCD Semiconductor Manufacturing Limited
Data Sheet
DUAL LDO REGULATORS
Pin Configuration
K Package
(SOT-23-6)
Pin 1 Dot by Marking
AP2401
CE1
V
IN
CE2
1
2
3
6
5
4
V
OUT
1
GND
V
OUT
2
Figure 2. Pin Configuration of AP2401 (Top View)
Pin Description
Pin Number
1
2
3
4
5
6
Pin Name
CE1
V
IN
CE2
V
OUT
2
GND
V
OUT
1
Function
On/Off control 1, logic high=enable; logic low=shutdown
Input voltage
On/Off control 2, logic high=enable; logic low=shutdown
Output voltage 2
Ground
Output voltage 1
Oct. 2009 Rev. 1. 4
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BCD Semiconductor Manufacturing Limited
Data Sheet
DUAL LDO REGULATORS
Ordering Information
AP2401
-
E1: Lead Free
G1: Green
TR: Tape and Reel
Package
K: SOT-23-6
AP2401
Circuit Type
B: Active High
(Without Built-in Pull-down Resistor)
1: Fixed Output 1.8V (Channel 1)
3: Fixed Output 2.8V (Channel 1)
1: Fixed Output 1.8V (Channel 2)
2: Fixed Output 2.5V (Channel 2)
3: Fixed Output 2.8V (Channel 2)
4: Fixed Output 3.3V (Channel 2)
Package
Temperature
Range
Condition
Output
Voltages
Part Number
Lead Free
AP2401B12KTR-
E1
AP2401B13KTR-
E1
AP2401B14KTR-
E1
AP2401B31KTR-
E1
Green
AP2401B12KTR-
G1
AP2401B13KTR-
G1
AP2401B14KTR-
G1
AP2401B31KTR-
G1
Marking ID
Lead Free
Green
Packing
Type
Active High With-
out Built-in Pull-
down Resistor
Active High With-
out Built-in Pull-
down Resistor
Active High With-
out Built-in Pull-
down Resistor
Active High With-
out Built-in Pull-
down Resistor
1.8V/2.5V
E9P
G9P
Tape &
Reel
Tape &
Reel
Tape &
Reel
Tape &
Reel
1.8V/2.8V
E9Q
G9Q
SOT-23-6
-40 to 85
o
C
1.8V/3.3V
E9R
G9R
2.8V/1.8V
E8R
G8R
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green packages.
Oct. 2009 Rev. 1. 4
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BCD Semiconductor Manufacturing Limited
Data Sheet
DUAL LDO REGULATORS
Absolute Maximum Ratings (Note 1)
Parameter
Input Voltage
Enable Input Voltage
Output Current (T
A
=25
o
C)
Power Dissipation (T
A
=25
o
C)
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
ESD (Human Body Model)
Symbol
V
IN
V
CE
I
OUT
1+I
OUT
2
P
D
T
J
T
STG
T
LEAD
ESD
Value
6.5
6.5
700
250
150
-65 to 150
260
3000
Unit
V
V
mA
mW
o
C
o
AP2401
C
o
C
V
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods
may affect device reliability.
Recommended Operating Conditions
Parameter
Input Voltage
Operating Junction Temperature Range
Symbol
V
IN
T
J
-40
Min
Max
6
85
Unit
V
o
C
Oct. 2009 Rev. 1. 4
5
BCD Semiconductor Manufacturing Limited
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